Nexus series has always been one of the best when it comes to cameras. But Onplus is also not a bad choice. The performance and battery back up of OnePlus 2 64GB is slight better. But still for me Nexus is fine, since I am a Nexus follower. :)

As per latest update by One plus India Facebook page. They will be rolling out OTA update next quarter to support VoLTE.

Meanwhile, all existing OnePlus users (including OnePlus One and OnePlus X users) using Jio services can use Jio4GVoice app (formerly known as JioJoin app) to experience enhanced call quality on the network.